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Lim X → 2 ( X X − 2 − 4 X 2 − 2 X ) - Mathematics

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Question

\[\lim_{x \to 2} \left( \frac{x}{x - 2} - \frac{4}{x^2 - 2x} \right)\] 

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Solution

\[\lim_{x \to 2} \left[ \frac{x}{x - 2} - \frac{4}{x^2 - 2x} \right]\]
\[ = \lim_{x \to 2} \left[ \frac{x}{x - 2} - \frac{4}{x\left( x - 2 \right)} \right]\]
\[ = \lim_{x \to 2} \left[ \frac{x^2 - 4}{x\left( x - 2 \right)} \right]\]
\[ = \lim_{x \to 2} \left[ \frac{\left( x - 2 \right)\left( x + 2 \right)}{x\left( x - 2 \right)} \right]\]
\[ = \lim_{x \to 2} \left[ \frac{\left( x + 2 \right)}{x} \right]\]
\[ = \frac{2 + 2}{2}\]
\[ = 2\]

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Chapter 29: Limits - Exercise 29.3 [Page 23]

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RD Sharma Mathematics [English] Class 11
Chapter 29 Limits
Exercise 29.3 | Q 14 | Page 23

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